Fairy Bros Damage Skin Box failed to give Dmg Skin

Brief bug summary:
The box failed to give the damage skin "Nine-Tailed Fox Damage Skin"
because I already have a completely different damage skin with the same name currently equipped
which I have gotten 10 minutes earlier from the "defeat 30 Chief Priest times" reward.

If it is not the step to reproduce, my hazy memories recalled using the box, changing the damage skin because I was expecting a coupon instead. But I cannot tell if it exactly what happened because I was not expecting to remember it.

Character name: Rexaar2
Character level: 254
Character job: Hero
World name: Scania
Date and time of the incident: around 6:20 AM EST, 4 March, 2020

Hello,
Can you confirm the following?
1. Do you still experience this bug - meaning you still did not get the selected damage skin upon relogging/etc.?
2. If yes for #1, did your Damage Skin Box get consumed upon selecting the skin?

The damage skin did not change to the selected damage skin after I logged back in some time later because I switched back to my old old damage skin few minutes after opening the box before logging off some hours later.

The damage skin box was consumed upon selecting the damage skin and nothing changed.

Based on what Jex has said, it was probably just server/client failing to synchronize properly and changing damage skin to another different damage skin with the same name is most likely just a complete coincidence.